2013 Taurus Question

I have a 2013 Taurus Limited. Great car! Enjoy the backup feature. Great gas mileage. Super pickup. Beautiful looking car and get compliments on it. Here comes the dropping boot! I have turned the lighting up as high as it will go for the dash, but the speedometer, 85% of the time, is invisible. I can't make out the speed. I am wondering if a light has burned out, if such exists?? If it does exist, where is its location and how difficult is it to replace?